The wick is made of a high grade of cotton or linen. The material is woven (or braided) so that it will burn in one direction and will curl so that its end remains in the candle flame's oxidizing zone for even and intense burning. Often, wire-core wicks are used.
Differentiate among the non-urinary waste management systems. The excretory system is a passive biological system that removes excess and unnecessary materials from the body, so as to help maintain homeostasis and prevent damage. The main organs involved in waste management are the skin, lungs, liver, and kidneys.
The Liver and the Kidney. 1  Liver Converts nasty chemicals into less harmful chemicals. Ammonia (a nasty chemical) is converted into urea (a less nasty chemical). 2  Kidney Removes waste products from the circulatory system: this process is called excretion. Urea is removed from circulatory system by the kidney.